Bit for rock-drills, moils, and picks.



W. CHILDS. BIT FOR HOOK DRILLS, MOILS, AND PICKS.

APPLICATION FILED SEPT.14,1908. I

Patented June 6, 1911.

' W. GHILDS. BIT FOR ROCK DRILLS, MOILS,'AND PIUK$.

APPLIOATION FILED SEPT. 14,1908. 1 Patented June 6,1911.

INVENTOR.

I stand how to ada lock-pin to fit the BIT FOR ROCK-DRILLS, MOILS, AND PICKS.

, Specification of Letters Patent.

Pate'nted June 6, 1911.

Application filed September 14, 1908. ,Serial No. 452,963.

To all whom it may concern: e it known that I, WALLACE Crimes, of the city of N eosho, county of Newton, State of issouri, have invented certain new and useful Improvements in Bitsfor Rock-Drills, Moils, 'and Picks.

The object of my invention is-to construct of metal, a bit for rock drills, moils, and picks with bits which are detachable, convenient, interchangeable, reversible, and economical; and so that such bits may be adapted to'and used on other like tools, by shaping tl'lt shank ends of such like tools for the holding of said bits in the forms erein shown, according to the work required. 'This object I attain by making a bit triangular with flattened sides; and means to fasten it to the end of a tool of the character above specified. I only show a shank end or section of a rock drill, moil, and pick in various forms and figures as any one versed in the art, which my invention appertains will underpt it and make'anduse it without showing the tools in full of which my invention may be a part, and this specification and the drawings will fully describe and illustrate my invention.

Figure 1, is a angular bit of a pattern for a pick or a gad,

and showing a hole through the bit whereby It may be secured in theend of a pick or gad. Fig. 2, is a lan view of'the triangular bit of a pattern or a rock drill or a pick, with threeedges and three points all sharpened and adapted for use when secured in the end of either tool. Fig. 3, is a perspective view, of the triangular bit of a pattern suitable for a heavy pick, showing the hole in the center large in diameter with the three points sharpened while the edges are left flat. Fig. 4, is a plan view of a headless hole. in the bit and to secure the .bit in the shank of a tool of the character described. Fig. 5, is a plan front View of section or end of a tool of the character described, suitable for a chisel, showing the triangular bit with one edge sharpened and exposed while the major part of the bit is secured in the end of said tool. Fig. 6, is a Fig. 5, turne around one qlfarter, and the it isseen secured between the jaws of said tool in a transverse slot; and in dotted lines at the bottom of said slot a V shaped socket into which one of the bit pointsenter. Fig.

science or manufacture to perspective view of the tril'an'side View of section of projecting downward.

7, is a cross-section ofFig. 6, on line 11 Y which shows the triangular bit as it rests the tool when designed for use as shown n Fig. 5; and the point of the bit resting 1n the V shaped socket. Fig. 8, is a plan side view of a, section of a tool of the character described suitable for a moil; it shows unequal beveled jaws and the bitsecured in a transverse slot between them, and in dotted lines the V shaped extension to said slot. Fig. 9, is a plan front view of a sec tion of said tool of Fig. 8,

point of the bit as it is secured therein ready for use. Fig; 10, is a cross-section of Fig. 8, on line 2-2, which shows the bit as it rests in the tool when designed for use as'shown in Fig. 9; and it also shows the Vshaped extension in th bottom of the transverse slot. Fig. 11, is a plan view of a section of an end of a tool of the character described suitable for a heavy pick, whereto the triangular bit is secured in a recessed and shouldered side of said end onto a stud which is an integral part of said end, by a headed screw bolt lock-pin.

turned around one quarter, only showing the sharpened Fig. 12, is a cross-section in perspective on headed screw boltsecuring the bit to place on said stud. Fig. 13, is a plan front view of a section'of a rock drill, showing the cutting edge of the triangular bit secured there in. Fig. 14, is a cross-section of Fig. 13, taken on dotted line a-a and showing the manner in which the bit is secured in place in the end of the drill D, of said figure. Fig. 15, is a cross-section of Fig. 13 longitudinally starting at line e.e but omitting the bit and, rivet, to show socket into which the bit fits. Fi 16, is a plan side view of a section of asty e of rock drill in which four triangular-bits are fitted and secured together, only a part of three bits are shown in this view. Fig, 17, 1s a plan side View of a moil, and showing an edge of the triangular bit designed for it and the shape of the slot in which it is secured, .w ich 1s "same form of slot shown inFig. 20. Fig. 18, is a cross-section of Fig. '17 on dotted lines cc showing the triangular bit with two points in reserve and one point hole through said stud threaded: and the v the V shaped Fig. 19, is a-planview of a section or end of a pick w bits secured therein 9, jaws 7 and holes through saidjaws at 5, a triangular bit 3, with flat sides and a hole.

same as in the moil, th only are exposed, b cate their outlines.

of Fig. 19, with e dottedlines india cross-section the bits omitted, showing- 5, therein, with the points or edges thereof sharpened so asto be adapted for any tool of the character specified, then insert the bit 3, in the slot 2, between the jaws 7, 7, so the the form of 510 pick when this t is desired to be used Fig. 21, 1s a plan side view of a pick end with the point of the triangularblt holes at 5, will line, then pass the lock-pin 4, through said holes at 5, and rivet it or have the lock pin fit tightly without riveting. To remove the bit 3, drive out the lock-pin 4, and the bit can be taken out; and given a 2;

shown in Fig.

22, is a plan view of but one cutting ed k and ending in a sh g. 23, is a plan it with the three poi oint ta ering back of a style as v 24 projecting therefrom. Fig. angular bit wi p it ta ering ba nts sharpene and ending in 24, is a plan lar bit with one point (1 and both taperin b boulder or oif-set. ew of a tr1 beveled and on tapering back der or off-set. ofend of Fig, '1

and each p a shoulder or o view of a triangu one edge Sharpe is a perspecti with one edge and ending in is a plan view the V socket 3, showing ar bit shown the triangul g 22. Fig. 27, is a p showing two 'V lan view of sockets crossing ve four trianof Fig. 16,

turn and present a new cutting edge, or point, then re-insert the lock-point or rivet.

In some shanks it may be desirable to omit one of the jaws 7 and this would then form a shouldered ofi-set in lieu ofslot 2, see Figs. 11 and 12, in which case the remaining jaw '7,has cast or forged thereon a stud 16; and the hole 5, of the bit 3, of a diameter to fit it and the hole 5, through the shouldered jaw 7, threaded; the bit 3, is slipped on to this stud 16, a screw bolt with slotted head at 6, is then screwed 'into the stud 16, and jaw 7, until the rim of the head of said bolt 4, rests tightly against the bit 3, and holds it firmly to place. The bit may be removed by unscrewing and taking out this b0lt.

Now, referring to Sheet 2, of the draweach other,

ular bits with their 1n the center of said 0 28, is a plan view in having a h ifierent ends. 11, 1, 2, 3,23 and 2 dges meeting rossed V sockets.

est le of a rivet or asten the bits in 19, 21, 6, s, 4 are modifie (Sheet 1) Referring to the ferably harthe bit 3 is made of metal pre lar in form with fl tsfor'use when desired, a moil point, or in the one bit, or

dened steel, triangu sides so that it 'prese a cutting bit edge, point all embrac styles of bits can as to be used and rock drill, moil, or p1 k a lock-pin hole pref through it; may be beveled exclusively to a The bit 3, has transversely ointsof said b or sharpened, and the lockh it larger or s the edges or p ings: the Figs. 13 and 16, show sectional shank end parts of m rock drills and D represents the shanks t ereof; Figs. 26, and 27 show respective1y the V socket ends of Figs. 13 and 16, the triangular bit 23, is I slipped into the said socket until its shoulder at 21, comes against shoulder 22, of the drill shank D, when the hole 5, in the bit will line with the holes 27, of the tapering sides 18, and the-rivet 4, passed through which fastens the bit in place, as shown in "said,

Fig. 13.

In Fig. 16, four triangular bits 25, are inserted in the V sockets, with their beveled edges 28, fitting back to back, and said bits pushed into the shank D, until their shoulders 21, come against the shoulders 22, and the holes 5, of said bits line with correspon 'ing holes through the ribs of the shank D, then the rivets one for each bit, are put in place and headed thus securing the bits on the speci The lock-pin may dless rivet or it may-- be a threaded bolt, see d 12. The sha depending up -which it is to be p an ordinary hea headed; or

Figs. 4, 11 an ends as shown, end giving or have a sh but one jaw nks or sectional transverse s Figs. 6 and 7, et in oneside, and 2. The shanks or ouldered ofi-s 7, see Fig. 1

firmly to place therein as shown in said Fig. 16. To remove the bi s it is onlynecessary to unhead and drive out the rivets thus freein the bits.

n Fig. 17, is a vertical slot having a square or enlar ed portion at its bottom, and the triangu ar bit 26, designed to slip into the slot 31, from the side of the end of the shank part of the moil-M, so two of .the

are also provided socket 9, at bottom 8, to' receiv broad cuttin is to be used, and to 'stea 8 To use my invent sectional ends as with a V sha 2, or shoul bit when a e the point 0 edge of the bit 3,

only necessary points will, when in place, have the edges of their shoulders 21, restingin the enlar e part of said slot 31, at 30, on the shoul era 32, thereat; and hole 5, be in line with the tion of I through said shank, or

corresponding holes in the jaws 18, of said slot 31, so that the rivet 4, may be adjusted to place in said holes; the moil is then ready for use.

In Fig. 19, is shown a plan view section of one style of shank end for a pick, having a slot 31, with an enlarged part or hole 30, extending from side to side through said shank and two bits of the style 24, secured therein; the bits are slipped into the slot from either side and the shoulders 21, rest onthe shoulders 32, while the rivets 4, .hold the bits to .place; a V socket 29, same as shown in Fig. 15, could be used here with a style of triangular bit as shown in Fig. 22, if preferred in lieu of slot 31, 30.

In Fig. 21, is shown a plan art 30, extending from front to lihck the said slot 31, 30, may extend part way from front to back or vice versa, but not entirely through the shank, so that a single bit 24, could be slipped 1 into place in said slot only from the front, or from the back as the case may be. This I square hole would bind the jaws 18, together eitherfront or back and stiffen the shank thereat, but not interfere with adjusting said bit.

All the parts herein described are cast, forged, or made in any suitable and con- 1 venlent way preferably forged of hardened steel. The parts may be of any size or style desired and convenient for manufacture and use. The drawings show theparts duly proportioned, but of.,course they can be changed The lock-pin and rivet erably drilled but may be punched. The lock-pin or rivet, may be of any convenient style or as shown in Figs. 12, 4,,and 28.

What I claim as new and desire to secure by Letters Patent is 1. A bit of the character specified, being thereon and a cutting edge between two apexes of the triangle, in combination with the shank end of a tool of the character specified, said shank end having an opening therein, and said bit adapted to be secured in said opening.

3. A bit of the character specified, being a triangular plate having cutting points at the apexes of the triangle and shoulders formed on the sides of said plate, in combination with the shank end of a tool of the character specified having an opening therein with shoulders formed thereat, and. means to secure said bit in said shank end opening and against said shoulders.

4. A bit of the character specified, being a triangular plate having shoulders formed thereon, and two of its apexes cutting points and its other apex a shank ada ted to be secured in an opening formed in the shank end of a tool of the character specified, substantially as and for the purpose specified.

5. A bit of the character specified, being a triangular plate having shoulders formed thereon and cutting points at the apexes of the triangle, in combination with a tool of the character specified, having a shank end said end having an opening therein, and means to secure said bit in said opening.

6. A bit of the character specified, being a triangular plate having a cutting edge, and shoulders formed on .both sides of said plate, in combination with a tool of the character specified having a shank end and an openin therein, shoulders formed on said shank en at said opening, and said bit adapted to be detachably secured in said opening,v with its shoulders against the shoulders of said shank end substantially as and for the purpose set forth.

7. A bit of the character specified, being a triangular plate having shoulders formed thereon and one of its apexesacutting point and the other two of its apexes a shank a triangular plate having shoulders formed thereon and cutting points at the apexes of the triangle, in combination with the shank end of a tool of the character specified, said shank end having an opening therein, and said bit adapted to be secured in said opening. v

2. A bit of the character specified, being adapted to be secured in an opening formed in the shank end of a tool of the character specified substantially as and for the purpose specified. 1

Witnesses M. E. OBRYAN,

a triangular plate having shoulders formed D. K. WEIR. 

